package com.heima.media.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.dto.PageResponseResult;
import com.heima.common.dto.ResponseResult;
import com.heima.common.enums.AppHttpCodeEnum;
import com.heima.media.dto.ChannelDto;
import com.heima.media.entity.WmChannel;
import com.heima.media.mapper.WmChannelMapper;
import com.heima.media.service.IWmChannelService;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.Date;
import java.util.List;

@Service
public class WmChannelServiceImpl extends ServiceImpl<WmChannelMapper, WmChannel> implements IWmChannelService {

    @Override
    public ResponseResult listByName(ChannelDto dto) {
        // 根据频道名称分页查询列表
        // 构建分页条件
        IPage<WmChannel> page = new Page<>(dto.getPage(), dto.getSize());
        // 构建查询条件
        LambdaQueryWrapper<WmChannel> query = new LambdaQueryWrapper<>();
        // 判断频道名称是否为空,不为空,添加查询条件
        if (!StringUtils.isEmpty(dto.getName())) {
            query.like(WmChannel::getName, dto.getName());
        }
        // 执行分页查询
        IPage<WmChannel> iPage = this.page(page, query);
        long total = iPage.getTotal();
        List<WmChannel> channels = iPage.getRecords();
        // 构建通用的分页响应
        PageResponseResult result = new PageResponseResult(dto.getPage(), dto.getSize(),
                total, channels);
        return result;
    }

    /**
     * 保存新的频道
     *
     * @param wmChannel
     * @return
     */
    @Override
    public ResponseResult<Integer> saveChannel(WmChannel wmChannel) {
        if (wmChannel == null || StringUtils.isEmpty(wmChannel.getName())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST);
        }
        LambdaQueryWrapper<WmChannel> query = new LambdaQueryWrapper<>();
        query.eq(WmChannel::getName, wmChannel.getName());
        int count = this.count(query);
        if (count > 0) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST);
        }
        wmChannel.setCreatedTime(new Date());
        this.save(wmChannel);
        return ResponseResult.okResult(wmChannel.getId());
    }
}
